Tire-valve.



BIO-816,006. PATENTED MAR. 27. 1906. G. E. DURYEA. TIRE VALVE.

APPLICATION FILED APR. 3, 1905.

v, vided. withan alr-passage throu h 1t'1 n the usual manner, and the upper en of tlns.a1r-'- eHARnEs D EA; or READING; PENNSYLVANIA. i

no. s e,ooe. Y

A Specification of LettarsPatehta' Apnlioation filed Aprils, 1905. Serial No. :u ae'm;

mama march 27, 19 06.

To all whom it may concern,-

Be it known that I CHARLES E. DuRYnA, a

citizen of'th United States, residing at Readin" in the county of 'Berks and State of Penn sy Vania, have invented certain new and usefulflm' 'roveinerit's in Tire-Valves for. Pneumatic esa'nd other Inflated Articles; and I' do he rebyjde'clare the followin to be a full,

- tlear, and exact descri tion'oft e invention,

,s'udh as will enable -ot ers skilled in-the art to which it appertains to make "and use the- 'same."' K i] My invention'relates to improvements in valves for pneumatic tires for vehicles and similar articles requiring inflation.

flatedarticle with th'e'l east -"ossible friction and unnecessary pressure,- t at will. holdit securely and with certainty after'inflation, that will permit it tobe deflated readily, and that hasno'delicate or perishable parts liable to clqg v elh stick, wear out, or otherwise j deterloratei' These objects are'accomplishedcom anyi ng specificatlon, 111 will valve-body; b, the gasket orvalve-seat; c, the check or valve pro er;-

by the .use of'the mechanism shown in the-acdrawin for ming part 'of this 0, represents the d, the check-holder, and e'.the cap. T ese parts are showninsection with the exception of the check a; i

v The valve-body a is ofla'n'y usual or preferred construction.sbfar-as'the outersurface of the'lower-end islconcerned. It is propassage is enlarg, A screw-thread is provide'd near the outer end of the'enlarged portion, and the gasket or valve-seat b is placed at the bottom end. fThis gasket is of a maor slightly "flexible 'v tllca nite.

material soft enough't'o -foi'm a erfect gasket terial soft enough to form a suitable'packing, but not. so soft as to for e readily or change its sha e easily; A num er of materials can be use for this purpose such as lead, cop-,

per-,hztfdihbber, vulcanized fiber and soft since any will under time and ressure orge to some extentlthe check 0, which is forced against this gasket to make a tight closure, is so 1f shaped as to force the gasket more firmly.

against. its seat "and --to' prevent any -movement of the material of the asket that might. prevent a free passage of t e air-duringm-'-- ation. result ls'secured' by prov ding gasket an The objctsof this invent on' are to pro-f duce'avalve that admit air to the" in-' Further unscrewin J from its seat until t e cylindrical point of the check no longer obstructsthe assagel The. cap is then removed and the ose attached;

the checkc with a conical bearin g surface and with a polnt or guideapproximately'cylinv I drieal lon eno to project throu h the of a ameter substantial corresponding to theairaassage. throng the valve-body. This'chec is further provided with a surface on-itsuppen 'sideadaptedto take a bearin on theend of the check-holder asses through thelower' end, .of the checkd, and a 'sma stem is also'rp'rovided, which olderand terminates in a large fiat head in the enlar ed passage intheup' er endof'the check-ho de'r; This hea'dis plane ass'ing through the stern of the check,- and wliile serving to attachthe'check to the holder it does not in any ,way' interfere with attened in a the passage of the air' through the central p o customary to make thecheck andits stem in the holder; In construction it-fis two parts, the checkfhai'nn'g asrnall hole'-passing through it" large enough to receive thevstem and united after the stem is placedin the holder by soft-soldering; It is;partijc 1i'---* larly to be desired that the'bearing surface of .the. check 'be'ftrue and smooth and hard Y enough to remain self This insures-that the 5681748 not damaged or; distorted by any roughness or'irregularity'ofthe valve-check.

The check-holder I is slightly enlarged above provide .'a 'I'I'IBHQIIS fOIL manipulating. Of course flat SIdGS to receive a wrench or any similar arrangementmay be used. The eat-- treme up er end of the eheck-holderi's thread-v ed outsi e and inside to receive the hose co'nnections of the two, sizes most commonly the f'valve body and preferably knurled to used.- Of course these threads ma beljof'any preferred sizesl Theca is rovi' ed tii'keep out dirt and to add a lS ed appearance. It is in no wise necessary tothe o eration of the valve, does not contribute to olding the air, and causes no inconvenience if lost. I

The operation of the valve isas'follows: The check-holder is unscrewed from the valve-body until the flattened head oflthe check is engaged by the lower end of the large passage through the checks holder.

lifts the check? away A clear passage now exists, permitting a free flow-,of air unobstructed" b any springs or checks that must be lifted y the an re' u1rin'g increased pressure orjany of the. .usua 0bjectionable features except1ng, of course, the

slight friction of the air on the passages, which is greatly reduced by makin these passages larger than is common. If the flow of air is intermittent, as when a hand-pump is used, the check and its stem being light and free tomove is blown upward against} the end of the check-holder and serves as a check valve to prevent any perceptible escape 'ofair, Since this check has no packings or soft-rubber parts, its movementis quite free in either direction, and no springs are needed, While all resistance to pumping is avoided; This feature is of decided importancewhen the operator is engaged in pumpinga'large autotire with an ordinary pump in hot weather, for it saves a large amount of' the labor. During the pumping the joint formed between the threads of the check holder and the threads in the outer end of the valve-body is exposed to the air-pressure; but since these threads are long 'verylittle escape is possible, and this escape only continues during the time that the checkis-free from its seat. A packing couldbe provided; but experience indicates that this ls'not necessary, particularly if-the threads are coated with common soap'or some similar substance. I When inflation is completed, the check-holder d is screwed downward, forcing the check c firmly upon its seat. This not only holds the seat or-gasket tightly in'place', but causes it to make a tight jo nt with the check and closes the opening in the most effectual manner. Since the seat cannot chan' e its shape in a manner tending 'to' close t e opening, it follows that the valve remains in good order and is ready for use atany time. If perchance the seat should stick to the check, unscrewing of the holder withdraw both check and seat and permit immediate repair. When witndrawn, ordinarily the seat or gasket remains in place while the check is attached to the holder, thus leaving no parts liable to be lost :or damaged. The stem of the check performs no function except to withdraw the check and even if bent accidentally to a greater or less extent does not interfere with the proper action of the valve. While this stern is preferably formed as described, other constructions and methods of attachment to the check may be used.

I claim- A valve-body having an air-passage therethrough withits outer end enlarged, forming \an interior shoulder, the outer portion of sai passage being interiorlyvthreaded, a valveseat resting on said shoulder and having passage therethrough, a check holder having exterior threads engaging the interior threads of the body, and having a passage in line with the passage in the inner end of said body, and an enlarged passage outward therefrom, a check having a double conical body with stem depending through the valve seat into the air-passa e in the inner end of the body beyond said shoulder anda stem extended in the oppositedirection into the enlarged bore of the check a and having a head movable therein and closing the communication between the large and small bore of the check, and a ca detachably secured to the outer end of said cheeky-holder.

In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES E. DURYEA. Witnesses: E. A. RUTH, B. E. BATES. 

